When CONFIG_BUG is not set/enabled, there is a warning
on ARCH=m68k, gcc version 11.1.0-nolibc from Arnd's crosstools:
../fs/afs/dir.c: In function 'afs_dir_set_page_dirty':
../fs/afs/dir.c:51:1: error: no return statement in function returning non-void [-Werror=return-type]
Adding "unreachable()" in the BUG() macro silences the warning.
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: linux-m68k@xxxxxxxxxxxxxxxxxxxx
---
include/asm-generic/bug.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-next-20211015.orig/include/asm-generic/bug.h
+++ linux-next-20211015/include/asm-generic/bug.h
@@ -154,7 +154,7 @@ void __warn(const char *file, int line,
#else /* !CONFIG_BUG */
#ifndef HAVE_ARCH_BUG
-#define BUG() do {} while (1)
+#define BUG() do {unreachable();} while (1)
#endif
#ifndef HAVE_ARCH_BUG_ON
